Closing tool



Dec. 28, 1954 H. HAIDEGGER CLOSING TOOL Filed Sept. 27. 1950 za 26 zssyaosf 4026 United States Patent O cLo'slNG vrooL Hans Elila'idegger, V`Soleure, V4Switzerland, assigner to Ebauch'esS. A., GrenchemSwi'tzei-lanil Application'septmb'er 27, 1950,Seia'l No. lsf/,7F17

Claims priority, :application ASwitzerland Novemhertl, 1949 ,8 Claims. .(Cl. 1113-318) The presentV invention `:relates -to la v:closing :tool particularly `suitable for -u'se :in securing a cover in 'closing position on 4a Epacking body.

In Vthe manufacture lofpackings Sfor small parts such .as `watch repair iparts=or fthe like, Athe bodyeo'f the ,packing may be pressed from :thin sheet "material such as aluminum. it is convenient to make the packing body with Van .upwardly turned llangeladapted yto vlreceive a flatfcover member. Thefflange is `then turned 'inwardly and .pressed ,against the rim of -the fcover.

g-It is `an object of tthe invention to .provide :a closing `tool -which is simple in manufacture, :ecient and reco- ;nomical in operation, land rugged in iu'se.

:In accordance with the invention a-.closing tool :is pro- :vided which .isadapted toioperate ina reciprocatory man- .ner, the .tool including iat leastone jaw which first moves transversely foldingin-theflange and .then moves vertically pressing .or :clamping .the flange .in :final ,closing 4xposition.

Other lobjects and .advantages -of ,the invention `will -be apparent yfrom the following description and from the accompanying drawing which shows, by way `of i example, yan embodiment tof rthe invention.

-In the drawings: Y

`Figure 1 is a verticalsectional view through '.a'closing ./tool in :accordance with the invention, the parts io'f the tool shown at rest.

Figure -2 is Aan `enlarged Afragmentary view .of the lower ,portion of .the tool shown yin VFigure il. AAdditionaliy, packing body is .shown positioneduonfa support, and the Vparts of theclosingytoobare shown in the position wherein Vthe flange isfolded inwardly and the ,ijaw is -creadytto start `a vertical movement ,pressing the flange -into its .'nafl ,posiitionl -Figure V3 .is .a vertical sectionalview of -a 'paekingtillustratingin full Alines,thefpositionof the ange before being folded inwardly, and .in dotted lines, .the position of xthe f flange. corresponding .to fthe showing in `v'Figure 2.

Figure 4 .is a vertical .sectional view through va -closed packing. A

Referring to `the drawing, .there is shown va .reciprocable body member .or lblock l within which is .an .actuating member or sleeve .2 .adapted .to .move a reciproca-tory manner within ythe :body member `1 .as will .later appear. The body member 21 maybeifeciprocated bythe use .of Aany conventional .machinery well-.known in the art. EIhe up .per end of sleeve 2 is provided with an external thread onto which yanut 4 is -threadedly engaged. '.lhefnutA bears against a shoulder ,5 ,forming the upperendcof .the-block l. A spring 7 inserted with-in ,a bore 6 -oflthe 4block 1 bears between the under -surfface ,of the shoulder Y and a shoulder 8 of thesleeve 2. The compression spring Tpresses the nut 4 .against the shoulder l5 Iand is not compressed during a normal pressing process, being only safety .means protecting the tool in the Aevent of improper operation :On the lower end of thesleeve Ztis -a flange 9 provided with eyelets 10 carrying lpins for -the .rotatable support of pressure rolls 11. 'Ihe sleeve 2 is secured kagainst yaxial rotation vby a wedge .13 xed to lthe block 1 and engaging in agroove 12 `of the sleeve .2. p

In the sleeve.'2 a collet bod;l 14 is -mountedfor upward and downward reciprocal movement. .Ar-rodV ,passes through a central bore of .the collet body 14 and is rigidly connected with the body .14 bytmeans `of ya transversely extending pin 16. lThe upper end of the rod V15 is provided with a thread 17 having .amut V18 in threaded engagement therewith bearing against the upper edge -of an 'internal shoulder or lflange 19 of the sleeve 42. A compression rice .spring 20-is positioned'betweemthe top 'of-the body 14and the -i'nner Aface 1of the :internal flange 19, so that the internal flange 19 is pressed against the nut 18.

lhecollet'body 1-4.supportsyjaws -23 pivotally mounted vthereon by Vmeansof pins '22. The jaws 23 are positioned inslot-szl of'thecolletbody f14=each being radially swingable -thereinon itspin 22. Vin'elasticipacleing 24, which maybe made of `rubber., .forxexampldis pos'tio'n'ed within the space surrounded by l,the jaws23 and owing yto itselasticity tend-s -to .move the :jaws `23 4away fromone another and to thereby press upwardly and inwardly inclined cam surfaces 2S 'of Jthe lower 'portion of the Ycollet jaws 23 against the ,pressure rolls v121. The flowerfportion of the .ja-ws vl23 is made with stop .surfaces 26 which, in the-position-of Fig. 1 lbearagainst the Iupper surface Aof a check 'plate or ymeinber 27 while Aan extending hammerend 40 of-thegjaw23 passes vthrough `anopening 28 -of the stop plate 27. The lower yportion `of rthe rod 15 -is provided with a blind axial bore-29 slideably receiving Va-shank or stem30 of a-holding-down plate or :presser vfoot 31. .A-compression spring V32 ispositioned between the -upper or inner end -of1the bore-29 and theupper end -faceof thestem 30 'tends `to move the shank 30 together with the Aholdingvdown plate 31 downwardly. Thedownward -movement of vthe plate Y31 is :limited by a transversely extending pin V33 through the rod -1-5, passing through -a slot 34 of 'the stem 30.

As shown in 4Figure 2 a .plate-35, which may be a revolving tableof a packingmachine, lformed with a die 36 for receiving .a packing body 37 is provided beneath lthe tool. The packing body 37 may be made of sheet `aluminum and is vformed with-an upwardly turned edge 'or LfangeliS-toreceive a cover-member 39. In order to close the packing 37 with thecover 39 in position, the flange .3S is first .folded into the dotted position of .Figure 3 by the closing tool which thereafter presses the ila-ngc .into the :position of Figure 4, that is, against the cover 39 of the packing.

This is accomplished by the operation of the closing tool after the packing 37, of Figure 3, has been placed in the die 36 as shown in Figure 2. In order that the upright flange `38 of the packing Amay be received in the space between the collet jaws 23 and the holding-down plate or presser vfoot 31, the closing operation .is started with the closing tool in its raised. position (higher than shown in Figure l). Upon the downward motion of the body `-1, 'the shoulders v26 of the jaws 23 bear against 'the check member 27 temporarily Vpreventing fur-ther ldownward movement of 'the collet 14. As the body 1 continues its downward movement, energy is stored in the spring andfthe pressure rolls 11 turn on `the cam surfaces 2S moving towards 'the bottom thereof to urge each of the jaws 23 with 1a transverse movement towards the opposite :jaw while the stop surfaces 26 slide on the checa member 27 towards the opening 28. During this transverse movementthe jaws 23 turn in or fold the ilange 38 inwardly into the positionof Figure 2, that is, into the dotted line position of Figure 3. The transverse movement continues until the stop surfaces 26 'slide along the upper surfa'cefof the Stop plate 27 to reach the edge of the opening 28jas Ashown in Figure 2, which illustrates the lower edge'offth'e collet jaws 23 bearing against the 'upper edge offthe lturned-in ange 38. l

Since Vthe jaws 23 are now no longer prevented from an axial downward movement by the `check plate 27, and since on the previous vdownward motion of the block 1, the spring -20 has been compressed, the `jaws 23 are suddenly released downwardiy inside the wall of the opening t28 with a hammerelike movement. By this nctio'n Iof the jaws 23 the turned-in ilange 38 is clamped against the Lcover 39 closing the packing.

During the initial 4increment 'of downward movement of the block 1 the holding-down plate or presser foot 3l bears against the cover 39 and holds it in `position on the packing 37 by the compression of the spring 32. if the block 1 is -now moved upwardly, the 'spring 32 is 4gradually released and the jaws 23 slide upwardly along the wall of the opening 28 until the position is reached as.

shown in Figure 2. In this position, the 4jaws 23 are -released to spread apart, the spreading being Alimited by the Contact of jaw hammer ends 40 with the wall of the opening 28. The elastic packing 24, which has been previously compressed between the jaws 23, then spreads the jaws away from one another into the position shown in Figure 1. The closed packing 37 may then be rcmoved from the die 36 and another packing may be inserted, whereupon the above-described cycle may be repeated.

In the embodiment shown in the drawing, the jaws 23 of the collet are pivoted to the collet body 14 by means of pins 22. However, in an equivalent construction a collet might be provided in which the jaws are integral with the body of the collet so that the jaws 23 might be moved transversely outwardly by their inherent elasticity without the use of the elastic packing 24.

1. In apparatus for securing a cover on a packing bod having a shoulder on which said cover seats and a flange projecting upwardly from the outer periphery of said shoulder, a support for said shoulder, a check plate disposed a predetermined distance above said support and having an opening directly over a packing body on said support, an actuating member guided for reciprocatory motion along the axis of said opening and having an internal shoulder at the end located away from said check plate, a collet axially reciprocable in said actuating member, a spring acting between said collet and said internal shoulder to force the collet downwardly relative to said actuating member; means for limiting said downward movement of the collet, said collet comprising a plurality of downwardly extending swingable jaws each of which has a hammer portion normally extending through the opening in said check plate, an outwardly extending stop surface which abuts said check plate during an initial increment of downward movement of the actuating member so that the actuating member moves downwardly relative to the collet against the action of said spring, and an upwardly and inwardly inclined cam surface; and means on the lower end of said actuating member engaging the cam surfaces of said jaws to force said jaws inwardly as the actuating member moves downwardly relative to the collet so that the stop surfaces of the jaws slip off of the edges of said opening permitting sudden downward movement of said jaws under the action of said spring, the inward movement of the jaws acting to bend said ange inwardly and the sudden downward movement of said jaws acting to hammer said flange down on the marginal portion of the cover.

2. In apparatus for securing a cover on a packing body having a shoulder on which said cover seats and a ange projecting upwardly from the outer periphery of said shoulder, a support for said container including said shoulder, a check plate disposed a predetermined distance above said support and having an opening directly over a packing body on said support, an actuating member guided for reciprocatory movement along the axis of said opening and having an internal shoulder at its upper end, a collet axially reciprocable in said actuating member, a spring acting between said collet and said shoulder of the actuating member to force the collet downwardly relative to the actuating member; means for adjustably limiting the downward movement of the collet relative to the actuating member, said collet comprising a plurality of downwardly extending swingable jaws each of which has a downwardly projecting hammer portion normally disposed in the opening in said check plate, an outwardly extending stop surface adapted to engage said check plate during an initial increment of downward movement of the actuating member so that the actuating member moves downwardly relative to the collet against the action of said spring, and an upwardly and inwardly inclined cam surface; rollers carried by said actuating member and engaging said cam surfaces of said jaws to swing said jaws radially inwardly as the actuating member moves downwardly relative to the collet so that said abutments of the jaws slip oi of the edges of said opening permitting sudden downward movement of the jaws under the action of said spring, the inward movement of the jaws acting to bend said flange inwardly and the sudden downward movement of said jaws acting to hammer said flange down on the -marginal portion of the cover, and resilient means inside the collet for spreading said jaws during upward movement of said actuating member.

3. In apparatus for securing a cover on a packing body having a shoulder on which said cover seats and a flange projecting upwardly from the outer periphery of said shoulder, a support for said container including said shoulder, a check member disposed a predetermined distance above said support and having an opening directly over a packing body heldv by said support, an actuating member guided for reciprocatory movement in axial alignment with said opening and having an internal shoulder at its upper end, a collet axially reciprocable in said actauting member, a spring acting between said collet and said shoulder to force the collet downwardly relative to the actuating member, a stem extending upwardly from said collet and projecting above the upper end of the actuating member, the upper end portion of said stem being threaded; a nut screwed on said threaded portion and adapted to engage the upper end of said actuating member to limit the downward movement of the collet relative to the actuating member, said collet comprising a plurality of downwardly extending swingable jaws each of which has a downwardly projecting hammer portion normally disposed in the opening of said check member, an outwardly extending stop surface adapted to engage said check member during an initial increment of downward movement of the actuating member so that the actuating member moves downwardly relative to the collet against the action of said spring, and an upwardly and inwardly inclined cam surface; means on the lower end of said actuating member engaging the cam surfaces of the jaws to swing the jaws inwardly as the actuating member moves downwardly relative to the collet so that said abutments of the jaws slip off of the edges of said opening permitting sudden downward movement of the jaws under action of said spring, the inward movement of the jaws acting to bend said flange inwardly and the sudden downward movement of the jaws acting to hammer said ilange downwardly on the marginal portion of the cover, and resilient means inside the collet for spreading said jaws during upward movement of said actuating member.

4. In apparatus for securing a cover on a packing body having a shoulder on which said cover seats and a ange projecting upwardly from the outer periphery of said shoulder, a support for said container including said shoulder, a check member disposed a predetermined distance above said support and having an opening directly over a packing body held by said support, an actuating member guided for reciprocatory movement in axial alignment with said opening and having an internal shoulder at its upper end, a collet axially reciprocable in said actuating member and having a tubular body portion, a spring acting between said collet and said shoulder to force the collet downwardly relative to the actuating member, a stem extending through and secured to the tubular body portion of the collet and projecting above the upper end of said actuating member, an upper end portion of said stem being threaded, a nut screwed on said threaded portion and adapted to engage the upper end of said actuating member to limit the downward movement of the collet relative to the actuating member, a lower end portion of said stem having a blind axial hole, a presser foot having a shank axially slideable in said hole, a compression spring in said hole and acting between the inner end of the hole and said shank to urge the presser foot downwardly; means for limiting downward movement of the presser foot, said collet comprising a plurality of swingable jaws extending downwardly from the body portion of said collet, each of said jaws having a downwardly projecting hammer portion normally disposed in the opening of said check member, an outwardly extending stop surface adapted to engage said check member during an initial increment of downward movement of the actuating member so that the actuating member moves downwardly relative to the collet against the action of said spring, and lan upwardly and inwardly inclined cam surface; means on the lower end of said actuating member engaging the cam surfaces of the jaws to swing the jaws inwardly as the actuating member moves downwardly relative to the collet so that said abutments of the jaws slip ol of the edges of said opening permitting sudden downward movement of the jaws under action of said spring, the inward movement of the jaws acting to bend said a'nge inwardly and the sudden downward movement of the jaws acting to hammer said tlange downwardly on the marginal portion of the cover, and resilient means inside the collet for spreading said jaws during upward movement of said actuating member.

5. In an apparatus for securing a cover member in inserted position against a shoulder of a packing body having an upwardly turned ange, a check member, a reciprocable body member, a jaw carried by the reciprocable body member and including a stop surface adapted to engage with the check member, and means for transverse movement of the jaw while its stop surface is in engagement with the check member for a turning-in movement of the upwardy directed flange of the packing body and for movement of the stop surface past the check member for downward movement of the jaw towards the packing body clamping the inwardly turned ange over the cover member.

6. In an apparatus for securing a cover member in inserted position against a shoulder of a packing body having an upwardly turned ange, a check member, a reciprocable body member, a jaw carried by the reciprocable body member, means forming a stop surface of a predetermined width carried by the jaw, the stop surface adapted to engage with the check member, and means for transverse movement of the jaw while the stop surface is in engagement with the check member for a turning-in movement of the upwardly directed iiange of the packing body and for movement of the stop surface past the check member for downward movement of the jaw towards the packing body clamping the inwardly turned flange over the cover member.

7. In an apparatus for securing a cover member in inserted position against a shoulder of a packing body having an upwardly turned iange, a support for the packing body, a check member, a reciprocable body member, a jaw carried by the reciprocable body member for movement towards and away from the support, the jaw adapted to engage with the check member stopping downward movement of the jaw for a predetermined portion of the length of the stroke of the reciprocable member, means for transverse movement of the jaw while in engagement with the check member for a turning-in movement of the upwardly directed ange of the packing body, and means for storing energy and for suddenly furthering the movement of the jaw towards the packing body rendered operative by movement of the reciprocable body member towards the packing body whereby upon a predetermined transverse movement of the jaw past the edge of the check member the jaw is impacted against the turned-in ange of the packing body firmly clamping the cover member in inserted position.

8. In an apparatus for securing a cover member in inserted position against a shoulder of a packing body having an upwardly turned ilange, a support for the packing body, a check member having a top surface and spaced a predetermined distance from the support and having an opening in alignment with the packing body positioned on the support, a reciprocable body member guided for motion along the axis of the opening, a jaw having a stop surface thereon and carried by the reciprocable body member for movement towards the support and normally positioned for contact by the jaw stop surface with the top surface of the check member, cam means for transverse movement of the jaw operative upon engagement of the jaw stop surface with the top surface of the check member for a turning-in movement of the upwardly directed ange of the packing body, and a spring positioned between the jaw and the reciprocable body member, the spring compressed by downward movement of the reciprocable body member while the jaw stop surface is in contact with the check member, whereby upon a predetermined transverse movement of the jaw stop surface over the edge of the opening of the check member the jaw stop surface is released and the jaw under the combined action of the reciprocable body member and of the spring is impacted against the turnedin flange of the packing body clamping the cover member in inserted position.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 699,843 Kenny May 13, 1902 1,188,638 Fish June 27, 1916 1,843,536 Barburi Feb. 2, 1932 1,854,424 Peelle Apr. 19, 1932 1,954,737 Korval Apr. 10, 1934 2,154,409 Podel Apr. 11, 1939 2,209,892 Melrath July 30, 1940 2,265,188 Murch Dec. 9, 1941 2,399,250 Peters Apr. 30, 1946 2,578,731 Norquist Dec. 18, 1951 

